Owings said he decided to do it now after again feeling pain June 23 as he was warming up for his first rehab appearance with Tucson. “I knew it would be a while before I could pitch again,” he said.

“He is highly motivated to do this,” said Padres manager Bud Black. “All I know is that he doesn’t feel well enough to pitch.”

Stults to Tucson

Left-handed starter Eric Stults, who has been on the disabled list since June 4 with one of three latissimus dorsi strains suffered by Padres pitchers this season — those to Huston Street and Andrew Cashner drawing more attention — threw 48 pitches in a simulated game at Petco Park Saturday.

Stults will make the first of at least two rehab starts with Tucson Thursday.

• Chase Headley extended his current hitting streak to 12 games with a first-inning double. It equals the longest streak by a Padres this season (joining Chris Denorfia) and is one of five hitting streaks of seven games of more by Headley this season.